the mind > attention and judgement > judgement or decision > absence of prejudice > [noun] > middle course > follower of (5)
A person who takes, follows, or advocates a moderate course.
A person who takes a middle course.
A middle-of-the-road person, esp. as regards politics.
a person who takes up an intermediate position (chiefly figurative).
= middle-of-the-roader, n.